18706376

素因数分解:

$2^3\times {\mathrm{13}}^1\times {\mathrm{43}}^1\times {\mathrm{47}}^1\times {\mathrm{89}}^1$

素因数の和:198

約数の個数: 64

約数和(自身を含む): 39916800

約数和(自身を除く): 21210424

約数列:

[1, 2, 4, 8, 13, 26, 43, 47, 52, 86, 89, 94, 104, 172, 178, 188, 344, 356, 376, 559, 611, 712, 1118, 1157, 1222, 2021, 2236, 2314, 2444, 3827, 4042, 4183, 4472, 4628, 4888, 7654, 8084, 8366, 9256, 15308, 16168, 16732, 26273, 30616, 33464, 49751, 52546, 54379, 99502, 105092, 108758, 179869, 199004, 210184, 217516, 359738, 398008, 435032, 719476, 1438952, 2338297, 4676594, 9353188, 18706376]

約数ペア:

[(1, 18706376), (2, 9353188), (4, 4676594), (8, 2338297), (13, 1438952), (26, 719476), (43, 435032), (47, 398008), (52, 359738), (86, 217516), (89, 210184), (94, 199004), (104, 179869), (172, 108758), (178, 105092), (188, 99502), (344, 54379), (356, 52546), (376, 49751), (559, 33464), (611, 30616), (712, 26273), (1118, 16732), (1157, 16168), (1222, 15308), (2021, 9256), (2236, 8366), (2314, 8084), (2444, 7654), (3827, 4888), (4042, 4628), (4183, 4472)]